140031 has 6 divisors (see below), whose sum is σ = 202280. Its totient is φ = 93348.

The previous prime is 140009. The next prime is 140053. The reversal of 140031 is 130041.

It is an interprime number because it is at equal distance from previous prime (140009) and next prime (140053).

It is not a de Polignac number, because 140031 - 2⁵ = 139999 is a prime.

It is a super-2 number, since 2×140031² = 39217361922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 15559 = 140031 / (1 + 4 + 0 + 0 + 3 + 1).

It is a Duffinian number.

140031 is a lucky number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 139995 and 140022.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140031.

It is not an unprimeable number, because it can be changed into a prime (140071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7771 + ... + 7788.

2¹⁴⁰⁰³¹ is an apocalyptic number.

140031 is a deficient number, since it is larger than the sum of its proper divisors (62249).

140031 is a wasteful number, since it uses less digits than its factorization.

140031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565 (or 15562 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 140031 is about 374.2071618769. The cubic root of 140031 is about 51.9287732908.

Adding to 140031 its reverse (130041), we get a palindrome (270072).

It can be divided in two parts, 1400 and 31, that added together give a triangular number (1431 = T₅₃).

The spelling of 140031 in words is "one hundred forty thousand, thirty-one".